Racks may be placed in freezer or water bath. Regardless of support position used, footprint is small enough to be conveniently used under a hood or on the benchtop. Seven different colors allow racks to be color-coded by experiment or user. Small racks (Thomas numbers 9259D30 through D48) can hold four 50 mL conical tubes; twelve 15 mL conical tubes; thirty-two 12-mm diameter tubes or 1.5/2.0 mL microtubes or thirty-two 0.5 mL microtubes. Small rack footprint is 2" x 7" or 3 1/2" x 7". Large racks (Thomas numbers 9259D51 through D66) can hold eight 30 mm diameter tubes (e.g. 50 mL conical tubes); twenty 20 mm diameter tubes; twenty-four 16/17 mm diameter tubes (e.g. 15 mL conical tubes); or forty 12/13 mm diameter tubes. Large rack footprint is 3 7/8" x 7 3/4".
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